The graphique card does not work with the latest native configuration and upgrades you have to add an external ppa so beware it's not an official ppa but I looked at it and it seems that there is no non-free software in the ppa

Instructions

Here's the url of the ppa [a]https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers[/a]

The ppa to add

ppa:oibaf/graphics-drivers

To add the ppa

sudo apt-add-repository ppa:oibaf/graphics-drivers

Then update your package list

sudo apt-get update

Once the list is updated you just need to install the paquet xserver-xorg-video-nouveau

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